package com.fushihua.y2015.m06.d25;
public class BigInteger{
		int sign;
		byte[] val;
		public BigInteger(String val)	{
			sign = 0;
			val = "";
		}
		public BigInteger add(BigInteger other)	{
			return other;
			
		}
		public BigInteger subtract(BigInteger other)	{
			return other;
			
		}
		public BigInteger multiply(BigInteger other){
			return other;
			
		}
		public BigInteger divide(BigInteger other){
			return other;
			
		}

}